Reorganization and Reorganization Costs G&A Realignment Costs - May 2017 Plan (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Jan. 01, 2017	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 1,806	$ 2,888	$ 17,699	$ 2,217	$ 2,129	$ 2,487	$ 3,250	$ 22,574	$ 10,083	$ 21,910
G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost								16,536
Reorganization and realignment costs								21,663	$ 0	$ 0
Employee Severance | G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost								14,956
Restructuring and Related Cost, Expected Cost Remaining	2,000							2,000
Recruitment and relocation | G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost								489
Restructuring and Related Cost, Expected Cost Remaining	4,000							4,000
Other Restructuring | G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost								1,091
Restructuring and Related Cost, Expected Cost Remaining	1,000							1,000
Share Based Compensation Expense | G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Reorganization and realignment costs								5,127
Restructuring and Related Cost, Expected Cost Remaining	2,000							2,000
Minimum | G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	6,000							6,000
Restructuring and Related Cost, Expected Cost	28,000							28,000
Maximum | G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	11,000							11,000
Restructuring and Related Cost, Expected Cost	$ 33,000							$ 33,000